Unlike cheaper blocks, the VGR V 656 has a true reference edge (marked with a double line on the side face). This edge must be aligned against the machined shoulder of the rail. Do not rely solely on screw alignment; use a dial indicator to ensure the block travels parallel to the rail axis within 2μm per 100mm.
At its core, the is a high-grade mechanical component designed for heavy-duty industrial environments. Although "VGR" typically denotes a manufacturer's series focused on rotary or linear motion control, the "V 656" suffix specifies a unique set of dimensional, material, and load-bearing characteristics. vgr v 656